add examples for hostname:port

lite-rpc/src/main.rs

@@ -267,7 +267,7 @@ fn configure_tpu_connection_path(quic_proxy_addr: Option<String>) -> TpuConnecti
         Some(prox_address) => {
             let proxy_socket_addr = parse_host_port_to_ipv4(prox_address.as_str()).unwrap();
             TpuConnectionPath::QuicForwardProxyPath {
-                // e.g. "127.0.0.1:11111"
+                // e.g. "127.0.0.1:11111" or "localhost:11111"
                 forward_proxy_address: proxy_socket_addr,
             }
         }

quic-forward-proxy/src/cli.rs

@@ -5,6 +5,7 @@ use clap::Parser;
 pub struct Args {
     #[arg(short = 'k', long, default_value_t = String::new())]
     pub identity_keypair: String,
+    // e.g. 0.0.0.0:11111 or "localhost:11111"
     #[arg(short = 'l', long)]
     pub proxy_listen_addr: String,
 }